近年来,笔者通过大量的腕足类化石的鉴定工作,对泥盆纪古生物、地层有了一些新的认识。现就下列问题提出来与大家共同商讨。 (一)Glyptospirifer quadriplicatus过去仅知道它产于下泥盆统郁江组和四排组两个层位。目前,从桂平马骝滩剖面资料了解到可以上延至中泥盆统应堂组。与其共生的属种有:Eospiriferina lachrymosa,Xenospirifer fongi。后两者是应堂组的标准分子。因 In recent years, the author through a large number of brachiopods fossil identification work, Devonian paleontology, strata have some new understanding. Now put forward the following issues to discuss with you. (A) Glyptospirifer quadriplicatus in the past only know that it is produced in the Lower Devonian Yujiang Formation and four rows of two layers. At present, it is learned from the data of the Maipingtan section in Guiping that it can be extended to the Middle Devonian Yingtang Formation. The symbiotic species are: Eospiriferina lachrymosa, Xenospirifer fongi. The latter two should be standard members of the group. because